$ git clone -n https://src.fedoraproject.org/rpms/xwaylandvideobridge.git /var/lib/mock/f39-build-1709275-41223/root/chroot_tmpdir/scmroot/xwaylandvideobridge
Cloning into '/var/lib/mock/f39-build-1709275-41223/root/chroot_tmpdir/scmroot/xwaylandvideobridge'...
$ git fetch origin 4f6ac1152868ff9c593d38b20dd1c51bf7068ca6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xwaylandvideobridge
 * [new ref]         4f6ac1152868ff9c593d38b20dd1c51bf7068ca6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f6ac11 Update to 0.3.0